Gun stock



FIG. 1 is a perspective view showing a gun stock embodying the design of the invention;

FIG. 2 is a top plan view;

FIG. 3 is a bottom plan view;

FIG. 4 is a side elevation view, the opposite side being a mirror image thereof;

FIG. 5 is a front elevation view;

FIG. 6 is a rear elevation view. 

The ornamental design for a gun stock, substantially shown and described. 